Replying to 2020 Linfe SFB 190 cm vs 184 cm

I am really torn about wheter to buy the 190 cm or the 184 cm Line SFB. I am 6' 3", but only weigh 170 lbs. Someone recently told me that weight was more important than height. I am an advanced skier who is trying to get better at butters and spins. I am really wondering how much stability I would be giving up at the 184 vs the amount of manuverability I would be giveing up at 190. Anyones thoughts would be super appreciated.